Question

我正在使用chartjs来显示折线图。

问题是我想在图表下面显示两个数据集的标签或图例。它应该显示数据集的颜色和文本描述。

＆＃13;

var ctx = document.getElementById("myChart").getContext("2d");
var data = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [
        {
            label: "My First dataset",
            fillColor: "rgba(220,220,220,0.2)",
            strokeColor: "rgba(220,220,220,1)",
            pointColor: "rgba(220,220,220,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(220,220,220,1)",
            data: [65, 59, 80, 81, 56, 55, 40]
        },
        {
            label: "My Second dataset",
            fillColor: "rgba(151,187,205,0.2)",
            strokeColor: "rgba(151,187,205,1)",
            pointColor: "rgba(151,187,205,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(151,187,205,1)",
            data: [28, 48, 40, 19, 86, 27, 90]
        }
    ]
};
var myLineChart = new Chart(ctx).Line(data);

＆＃13;

<script src="http://www.chartjs.org/assets/Chart.js"></script>


<canvas id="myChart" width="400" height="400"></canvas>

＆＃13;

我该怎么做？

Answer 1

使用generateLegend获取图例HTML并输入您选择的HTML元素。

document.getElementById("legend").innerHTML = myLineChart.generateLegend();

使用HTML

<div id="legend"></div>

你也想要设计风格

#legend ul {
    list-style: none;
    font-family: 'Helvetica Neue', 'Helvetica', 'Arial', sans-serif;
    font-size: 12px;
}

#legend ul span {
    display: inline-block;
    height: 1em;
    width: 1em;
    margin-right: 0.5em;
}

小提琴 - http://jsfiddle.net/0hagvdas/

Answer 2

如何显示数据标签？我试图使用索引标签。查看：https://plnkr.co/edit/gdOEKze1QdzzinUwryCy?p=preview

var dataThird = {
label: "s3",
data: {
indexLabel: 'dataPoints',
indexLabelPlacement: 'outside',  
indexLabelOrientation: 'horizontal',
dataPoints: [45220, 49450, 79880, 21690, 15112, 22452, 34400, 34227]
},
lineTension: 0.3,
fill: false,
borderColor: '#89da59',
backgroundColor: 'transparent',
pointBorderColor: '#89da59',
pointBackgroundColor: '#89da59',
pointRadius: 5,
pointHoverRadius: 7,
pointHitRadius: 30,
pointBorderWidth: 2,
pointStyle: 'circle'};

Answer 3

在添加示例的示例中进行检查：{ 图例：{display：true，位置：“底部” }

对于图表下方的图例这是超级链接[https://jsfiddle.net/hiren65/xer2qvph/4/][1]

[1]：https://jsfiddle.net/hiren65/xer2qvph/4/ enter code here

使用chartjs在折线图中显示数据标签（图例）

3 个答案: